Transport interface lacking

[ghost]

The current Transport interface does not seem suitable for transports that are not request-response oriented.

With HTTP, the correlation of request to response is part of the protocol. I have a project where I'm using a raw socket. Once I get a message, I need to still inspect it to see if the id of a response matches a previously sent request. So I end up having to decode to JSON anyway and so JSON decoding happens twice in the app.

I'm not sure of the best way forward.